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instance store used case - Coggle Diagram
instance store used case
Used case
A RAID mirror can be a good method to manage a disk level failure,
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However it alone is not a full solution as you will continue to run an a defective instance until it is fixed,
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If the requirement is only for fast Read, the data does not change frequently,
Use S3 to host the master copy and basic snapshots or Lambda to pick up and write the incremental changes bask to S3.
If the data is changing, can consider file level or block level replication to a standby Instance with Instance Store volumes.
AWS do not have a services for this at present, but it can be done with 3rd party products.
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Possibly the design is no longer optimal and you should consider a High Performance Compute (HPC) solution which has additional safeguards and recovery methods built in.
How to backup?
2 methods
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Create a new EBS volume, and then copy the data on your instance store volume to the EBS volume.
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limitation
You can specify the instance store volumes for your instance only when you launch it. You can't attach instance store volumes to an instance after you've launched it.